Erbijsommen tot 20
Erbijsommen
|
1.
8 + 8 =
7
16
|
2.
10 + 10 =
20
5
|
3.
3 + 15 =
6
18
|
4.
18 + 2 =
14
20
|
|
5.
12 + 5 =
1
17
|
6.
13 + 4 =
17
8
|
7.
20 + 0 =
20
10
|
8.
15 + 0 =
15
4
|
|
9.
10 + 0 =
1
10
|
10.
6 + 9 =
2
15
|
11.
20 + 0 =
20
11
|
12.
5 + 14 =
12
19
|
|
13.
1 + 4 =
6
5
|
14.
8 + 1 =
12
9
|
15.
5 + 6 =
2
11
|
16.
19 + 1 =
20
14
|
|
17.
13 + 7 =
7
20
|
18.
1 + 14 =
15
3
|
19.
9 + 8 =
17
9
|
20.
15 + 4 =
6
19
|